Can anybody point me to some software which can show the sky as seen from, say, Procyon; or from any other not too distant place in our galaxy.
Let me explain as this iwould be a variation on some plantarium shows which depict how the stars seen from Earth move over periods of thousands of years.
Modern star catalogues have the details of tens of thousands of stars. By details I mean where they are in three dimensions relative to Earth and their absolute magnitude. Then it is possible to recompute declination, right ascension, and distance from somewhere else, and then scale the absolute magnitude to apparent magnitude from the new observation point. Lastly, to portray this new sky. It could also show changes over time if the proper motions were also included in the calculation. Seven variables per star.

Science fiction authors would then have a resource to realistically describe and show constellations as seen from the new vantage point.

It might also provide a tool for plotting the route of a star-ship that gravitationally loops between 20 to 40 degrees say around a target star and then heads off to the next target. Eventually returning to good old Sol with lots of closeups of the planets circling those stars.

Though whether in reality a ship with the necessary lifetime of hundreds of thousands of years could be built is a moot question.